dns troubles

I'm running Ubuntu 6.10 using ISPConfig. I followed the tutorial here http://www.howtoforge.com/perfect_setup_ubuntu_6.10. I set this up on two machines and I had no problems getting into ispconfig. I then worked through this tutorial on running my own dns servers http://www.howtoforge.com/ispconfig_dns_godaddy with the only exception being I am not using godaddy as my registrar. After an initial goof of running the primary and secondary servers on the same machine, I was able to run dig @ns1.hostmyvids.com any hostmyvids.com and here are my results:

However, I am not consistently able to dig these records. I was just able to run dig @ns1.hostmyvids.com any www.hostmyvids.com and got some info back but, when I tried using mail.hostmyvids.com, I got ; <<>> DiG 9.3.2 <<>> @ns1.hostmyvids.com any mail.hostmyvids.com